Drill-forging mechanism



Patented ug. 7, 1928.

, sfr-aras html@ Fill0 ERY COMPANY, A CORPORATION OF MASSACI-USETTS narnia-roseraie Aipncati'n rila'Ap'rn as, iaa serial lne. aaiaef -This:` invention" relates to drill forging mechanism and morelp'articularly to` a punchv able mechanism must be provided to open' the sam'ewhich iscustomar'ily done by` having an* elongated punch adapted besides opening the hole to enlarge the same beyond its normal sizeif necessary., Due to varying conditions'such 'as vdifferentlengths of steel or punch, considerable'- movement of the punch will sometimes take place before actually engaging the steel or before the same has been completely withdrawn therefrom. In the punching mechanism herein specilically'di'sclosed, a pneumaticV hammer 1s employed and it is'of courseunnecessary to actua'te said' hammer until the punch has actually engaged the steel. It is accordingly'an'object'of'the invention to provide improved m'e'ans'v whereby the pneumatic hammer willnot be actuated until the punch actually engages the steels regardless of the amount Vof"pu`i`1` ':h movement necessary to cause said engagement, which'manner of operation'is in distinction to those punchingV mechanismswherein'the hammer is actuated soon after" 'ifnot immediately upon forward movement. A further object is yto provide improved means whereby the punchfmay be fed forwardly andfif desired 'said means can be used toA withdraw the pin from the steel.'

In the accompanying drawings I have shown for purposes of illustration one form i vention; I have lshownfthe same associated witha drill Sharpener generally indicated at 1 an'd'of' a well known type. dns the specific details thereof do not enter into the present invention, it"will suffice'toV say'that the same has cooperating relatively movable clamping jaws 2 "a1id4v '3 having"laterally overhanging upperV and lower lips 4 and 5 adapted to clamp a drill lsteel 6 with its bit 'end/7 adjacent a punch mechanism 8. Thismechanism comprises a frame 9suitably mounted upon the' rear portion of the forging machine framel" and has guide grooves 10 to receive lips 11 0f a 1 no`vable hammer base 12. The hammercomprises a cylinder 13 provided. withach'ucl; 14 to receive the shank 15 of a 'collared punch 16 which is hammered upon a: hammer piston 17 reciprocably actuated by'iluid controlled by a suitable valvemechanism 18. A rear main controllingvalve supporting head 19 has threaded engagementA with the rear end of the cylinderf13 and is'adapted with the cylinder 13 toslide relative to the base 12 due to suitablesupporting means herein con'iprising :i collar 20 disposed between lugs 21 carried on thefbase 12. The front end of the cylinder is slidaloly'r guided by a `guide 22 horizontally split, although it will be clear thata steel punchy supportv 23 carried by the base 12 could'be usedalone to Vsupport the front end of the punching mechanism. A link 24C is pivotally connected atits respective ends to tlie'support 23 and arm 25 of a pin puller device having `a hand lever 26 pivotallysupported upon the frame 1. As shown in Fig. 2, the arin `25 has abifurcated portion 27 and can Ibeus'edto withdraw a stuck punch pin from the steel in case it is impossible to remove the pin while remaining in the hammerfas shown in`Fig. 3.

Disposed within the head 19 is my improved means for automatically controlling actuation ofthe hammer in accordance with feeding thereof. This means comprises a longitudinal `passage 28 connnunicating with the valve mechanism 18 and a transverse Huid inlet passage 2.9 to which Huid is supplied through a nipple SOextcnding through a slot 81 formed inthe head 20. A longitudina'lv valve bore 32l'traversing the opening 29 receivesI a two spool valve 33 having an annularf space 341 adapted when in the position shown in Fig.V 3 to allow flow of fluid fro'nithenipple 30 to a passage 28 and tlieieb'yactuate thc Vpiston 17, although when inffthe positionshown in Figa Huid is sluit ofi" to preventr operation of the hammer. lt is to Vbe noted thatin this latter position the cylinder i and head 19 are Adisposed away froiii the end portion of fthe 4Collin* Iiioperatin of the device,`the steel will lUU be clamped between the lips el and 5. Pulling down the lever 2G causes forward movement of the base 12 and cylinder, it being j noted that duringsuch operationV the valve 33 is in a position asshownin Fig. l and accordingly no air will flow to the hammer. As long as the punch does not engage the steel to cause rearward movement of the head 19 relative to the collar 20, the hammer mechanism may be fed forward any.

distance without actuation thereof. However, uponfengagement ofthe punch and steel, the hammer cylinder will be held stationary while the base l2 continues to move forwardly, whereupon theV collar 20 will force the valve 33 forwardly to allow flow of fluid from the nipple through passagesv 2S)k and 28 to actuate the hammer iston whereupon the punch will be hammered intoy lize the motor for withdrawing' the pin, suitable mechanism could of course be employed, butas a partof the gist of the present invention is to provide improved means whereby the punch will not be operated until having actual engagement with the steel, I have not disclosed this other well known mechanism. If for any reason, as before said, the punch is irremovable from the steel, then the punch may be removed while in the steel and the steel placed in its reverse position between the clamping jaws a and 5 to permit engagement of the punch collar by the bifurcated portion 27, whereupon great force may be exerted tov withdraw the punch pin. A

TWhile l have in this application specifically dcscribed one forni which my invention 1 may assume in practice, it will be understood that this form has been shownfor purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

VW' hat l claim as new and desire to secure by Letters Patent is:

l. A' drill steel punch mechanism `coinprising a fluid actuated hammer punch, means for slidably supporting the same, niechanical means for feeding said hammer punch forwardly, and means whereby the same is automatically actuated upon actual engagement with a steel including a controlling valve initiating fluid flow tothe punch hammer on' engagementof the punch with a steel. f

2. A drill steel punch mechanism comprising a fluid actuated hammer punch, means for slidably supporting the same, mechanisteel, said motor-and punch being mounted on said supporting means for movement relative thereto, manual means for moving said supporting means toward the drill steel and for further moving 'said supporting means after engagement of the punch withV the drill steel, andmeans for rendering said hammer operative only upon said further movement. c

, l. A drill steel punching mechanism com# prising a slidable base, a hammer actuated punch carried thereby and movable relative thereto, means connected to said base for slidably moving the sanieand said punch,

and meansV for controlling the'operation of` said punch functioning on relative movement between said base and punch when the punch engages a drill steel.

5. ln combination, drill steel clamping mechanism, a base movably supported adjacent said mechanism, and punching mech-V anism carried thereby including elements respectively fined and movable relative to said base, and meanswhereby said punch is rendered operative only upon engagement with a drill steel. i' Y .6. In a drill steel punching mechanism comprising a hammeringmotorl having Va valve mechanism associated therewith for controlling its operation, means for supporting said motor, said `support being engage-` Y able with said valvemechanism to cause actuation thereby on relativeniovement of saidv motor and support, and Vmeans, for manually moving saidsupport, said means adapted to effect said relative movement upon engagement of said punch with a drill steel.

7. The combination with a pin puller mechanism includingan operating lever, lof

.a drillV steel punching mechanism comprising a fluid actuated hammer punch, and

mechanism including an operating lever, of

a drill steel punching mechanism comprising a fluid actuated hammer punch, means operatively connected to said pin puller lever for feeding the punch forwardly, and means Y' e whereby the punch is actuated only upon aca tualengagement'with a steel. y e p In testimony whereof I afliX my signature.

Vwenn ii. winniian; 

